The reaction of polyamines with phosphorous acid and formaldehyde in water under focused microwave irradiation provides a facile and rapid synthesis of poly(aminomethylenephosphonic) acids.
Synthesis, characterization and comparative study of aminophosphonate chelates of gadolinium(III) ions as magnetic resonance imaging contrast agents
作者:S.W.Annie Bligh、Charles T. Harding、Andrew B. McEwen、Peter J. Sadler、J.Duncan Kelly、Janet A. Marriott
DOI:10.1016/0277-5387(94)80018-9
日期:1994.6
Gadolinium(III) complexes of aminophosphonates, including a novel ligand LH-4(8), have been investigated as potential contrast agents for NMR imaging. Water H-1 relaxivities at 10 and 200 MHz were determined and luminescence measurements, on Tb(III) complexes, allowed the determination of the number of coordinated H2O molecules. The complexes bound strongly to hydroxyapatite, suggesting possible targetting to bone in vivo. This was confirmed by Gd-153 tracer studies with the most favourable biodistribution in rats being shown by gadolinium(III) ethylenediamine-N,N,N',N'-tetrakis(methylenephosphonate).
Synthesis and study of complexing properties of xylylenediaminotetra (methylphosphonic) acids
作者:Yu. M. Polikarpov、F. I. Bel'skii、S. V. Matveev、T. Ya. Medved、M. I. Kabachnik
DOI:10.1007/bf00949804
日期:1982.3
Synthesis, characterized, QSAR studies and molecular docking of some phosphonates as COVID-19 inhibitors
High-throughput microwave-assisted discovery of new metal phosphonates
作者:Mark Feyand、Christopher F. Seidler、Carsten Deiter、Andre Rothkirch、Alexandra Lieb、Michael Wark、Norbert Stock
DOI:10.1039/c3dt50413a
日期:——
A systematic study was carried out to investigate the influence of linker geometry, metal ionic radius as well as the nature of the counter ions on the structure formation of metal tetraphosphonates. Two tetraphosphonic acids p- and m-(H2O3PCH2)2N-CH2-C6H4-CH2-N(CH2PO3H2)2, six metal ions (Ca2+, Mn2+, Co2+, Ni2+, Zn2+, and Cd2+) and two different counter ions (Cl− and NO3−) were employed using high throughput methods. Microwave (MW)-assisted heating led to the discovery of ten new metal-phosphonates which crystallize in three different crystal structures. The combination of direct methods and force field calculations allowed us to establish the crystal structures. The counter ion and the ionic radii of the metal ions have a profound influence on the crystallinity and the formed crystal structure. All compounds were characterized in detail by thermogravimetric analyses, IR spectroscopy and magnetic susceptibility measurements. The proton conductivity of two selected compounds is also reported.